Well tubing



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WELL TUBING Filed March 11, 1946 2 Sheets- Sheet 1'lllalillllnpllllllllllrlrm '11,!!!Illllqlitllrllrll/I/ {ff/Mm 4 y 948.c. w. SPROULL 2,445,249v

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D d I I 00 I o DWW I O 'lrlllllLy Patented July 13, 1948 Charles'W.Sproull, Houston, Tex.; Edith M.

Sproull executrix of said Charles W. Sprouli,

deceased Application March 11, 1946, Serial No. 653,595

6 Claims. (CL ass-'22) This invention relates to a well tubing and hasmore particular relation to a novel type of pump tubing.

An object of the invention is to provide a tubing of the characterdescribed having a by-pass conduit through which the gas in the well mayescape to the ground surface independent of the tubing itself.

It is another object of the invention to provide a novel type ofcoupling for the tubing sections; said coupling having a by-passtherethrough.

A primary object of the present invention is to provide, in a well pump,a by-pass conduit leading from beneath the seal between the pump and thecasing and having a discharge at the ground surface whereby gascollecting above the well fluid-may be relieved from the well so that itwill not collect and interfere with the operation of the pump.

Other objects and advantages of the invention will be apparent from thefollowing specification which are illustrated by the accompanyingdrawings, wherein- Figure 1 is a sectional view of a Joint connectingthe sections of a well tubing including the novel type of coupling.

Figure 2 is a side view thereof partly in section 2 In the presentillustration a fluid lift type of pump is shown and beneath the casingHi there is a packing assembly ll forming a seal between the upper endof the pump cylinder and the casing i.

The lower end of the pump cylinder is submerged in the liquid, in thecasing I, to be pumped and in oil wells gas accumulates between thetaken at right angles to the view shown in Figure 1.

Figure 3 is a cross-sectional view taken on the line 33 of Figure 1.

nate the same parts in each of the figures, the

numeral l designates a well casing to the upper end of which the casinghead 2 is connected which is provided with an outlet line 3. Within thecasing there is shown, in the present illustration, a pump tubing 4which is sealed'with the casing head by means of a cap 5. v

The numeral 6 designates a pump cylinder whose lower end is equippedwith the upwardly opening inlet valve mechanism 1. In the cylinder 8there is a reciprocable plunger 8 which is reciprocated by the plungerrod 9. This rod in turn is reciprocated by a, suitable pump operatingmechanism which is enclosedin the casing Ill which is connected to thelower end of the pump tubing 4.

packing assembly I I and the surface of the liquid and if allowed tocontinue to accumulate 'it will eventually enter the pump cylinder andinterfere with the operation of the pump.

As hereinabove indicated it is one of the chief objects of the inventionto provide means for relieving the gas which accumulates in the well. Inorder to do this the gas must be by-passed from the casing beneath thepacking assembly and discharged at the ground surface.

A special type of pump tubing has, accordingly, been designed which willnow be described.

This pump tubing is composed of substantially similar tubular sectionsl2 whose adjacent ends are united by a special type of coupling l3. Thiscoup7ing is-internally threaded at each end and also has the internalannular channels ll, it which are connected by a vertical channel IS inthe coupling. This channel I5 is preferably formed by externallygrooving the coupling i3 longitudinally from one channel It to the otherand then welding a plate, as l6, over the groove.

There are the inside tubular upper and lower elbows i1, i8 associatedwith each coupling. One

end of each elbow is fitted through an opening tions l2 so that the endsof the coupling i3 can be threaded onto the adjacent ends of thesections l2.

The inner end of the elbow I1 is turned upwardly and the inner end ofthe elbow I8 is turned downwardly so that said elbows will receive theadjacent ends of a pipe i9.

From the foregoing it will be apparent that each section of the pumptubing with the corresponding by-pass pipe l9 and elbows IT, l8constitute a unit to the end that the pump tubing maybe made up of thesepre-assembled units. The pump tubing may therefore be conveniently madeup while installing the pump in the well and broken up when it isdesired to pull. the pump. It is to be noted, however, that the-lowercoupling It has its lower elbow I'ia on the outside rather than on theinside with the upper end of the pipe l9a connected into said elbow Ha.This pipe l9a leads down through the packer assembly ii and terminatesin the gas collecting chamber beneath.

The upper end of the by-pass pipe, which is made up of the pipe sectionsit, and itia, is turned laterally through the pump tubing, above thecasing head and is equipped with a control valve 21).

From the foregoing it is apparent that the gas collected above the oil,and beneath the pump packing in an oil well may be released, at the willof the operator, so as not to interfere with the operation of the pump.

The drawings and description are illustrative merely while the broadprinciple of the invention will be defined by the appended claims.

What I claim is:

1; In a tubing having tubular sections, a one piece tubular couplingconnecting said sections and, having a single channel within the wallthereof whose ends terminate within the tubing and tubular fittings inthe tubing connected into the channel ends.

2. In a tubing having tubular sections, a tubular coupling connectingsaid sections and having a channel within the wall thereof whose endsterminate within the tubing, independent pipes in the respectivesections and tubular fittings which connect the adjacent ends of saidpipes into the corresponding ends of the channel.

3. In a well tubing composed of tubular sections and tubular couplingsinto which the adjacent ends of the sections are threaded, anindependent pipe within each section and adjacent the inside wallthereof, a tubular elbow at each end of each section and anchoredthereto and into which the corresponding ends oithe pipe in 4 saidsection are connected, each coupling having a. single, longitudinalchannel within the wall thereof whose ends are in communication with thepassageways through the corresponding 5 elbows.

4. In a well tubing, a tubular tubing section whose ends are externallythreaded, an independent pipe in said section whose ends terminate intubular elbows which extend outwardly through, and are anchored to, saidthreaded ends.

5. In a well tubing, tubular tubing sections whose ends are externallythreaded, a tubular coupling threaded onto, and connecting, adjacentends of said sections and having a, single channel in the wall thereofextending longitudinally of the coupling, an independent pipe in eachtubing section, each pipe terminating in a tubular elbow which extendsthrough and is anchored to, the

- corresponding threaded end of the section and 29 communicates withsaid channel, whereby a continuous conduit is formed through said pipesand channel.

6. The combination with a well casing and a tubing therein leading tothe ground surface of annular packing between the tubing and casing andan independent conduit whose lower end is extended through said seal andwhose upper end extends to the ground surface, said conduit includingby-pass channels through the tubing con- 30 plings.

CHARLES W. SPROULL.

REFERENCES CIITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,178,999 Fleming Apr. 11, 19161,736,923 Lalonde Nov. 26, 1929

